We propose to adopt the precisely measured anomalous magnetic moment and Lamb shift as tests for the possible existence of the radiatively induced Lorentz and CPT violation effects in quantum electrodynamics. To this end we calculate the one-loop vacuum polarization tensor and vertex radiative correction in dimensional reduction and on-shell renormalization scheme. We then explicitly show how t...

in this paper, lagrangian and equations describing one-dimensional anisotropic non-heisenberg model are studied. in this study we used the generalized coherent states in real parametrizations and the feynman path integral for these states in su(3) group. these equations describe nonlinear dynamics of non-heisenberg ferromagnetic chain completely. solutions of these equations are magnetic solito...

Neutron diffraction measurements on a single crystal of CeGe1.76 reveal a complex series of magnetic transitions at low temperature. At TN≈7 K, there is a transition from a paramagnetic state at higher temperature to an incommensurate magnetic structure characterized by a magnetic propagation vector (0 0 τ) with τ≈14 and the magnetic moment along the a axis of the orthorhombic unit cell. Below ...

This paper studies the quark condensate, magnetic moment, polarization, and susceptibility in a strong external field by employing Dyson–Schwinger equations (DSE). The results show these physical quantities as functions of field. We note that quark’s spin polarizations are approximately proportional to magnitude. For comparison, we investigate moments nucleon constituent model framework demonst...

[1] We have examined residual magnetic field vectors observed in Saturn’s magnetosphere during the first 2 years of the Cassini mission and have fit them to a simple axisymmetric model of the ring current in the middle magnetosphere. We then examine the variations of the ring current parameters with size of the magnetosphere. In addition, we obtain secondary parameters, including the value of t...

The magnetic energy and the magnitudes of the magnetic moments are calculated for excited magnetic configurations with strong moment cantings. The calculations are performed by use of an exact constraining scheme for the moments via constraining fields, and by use of an approximate constraining scheme via the prescription of the local spin quantization axes in the spin atomic sphere approximati...

A global fit to the anomalous magnetic moment, b → X s γ and Higgs limits in the constrained MSSM Abstract New data on the anomalous magnetic moment of the muon together with the b → X s γ decay rate and Higgs limits are considered within the supergravity inspired constrained minimal supersymmetric model. We perform a global statistical χ 2 analysis of these data and show that the allowed regio...

In this article, we study the magnetic moment of the pentaquark Θ(1540) as (scalar)diquark-(pseudoscalar)diquark-antiquark state with the QCD sum rules approach in the external electromagnetic field. Due to the special structure of the interpolating current, only the electromagnetic interactions of the s quark with the external field have contributions to the magnetic moment with tensor structu...

By using the Gerasimov-Drell-Hearn (GDH) sum rule and an isobaric model of kaon photoproduction, we calculate contributions of kaon-hyperon final states to the magnetic moment of the proton and the neutron. We find that the contributions are small. The approximation of σTT ′ by σT clearly overestimates the value of the GDH integral. We find a smaller upper bound for the contributions of kaon-hy...

The spin and orbital magnetic moments of the Fe3O4 epitaxial ultrathin film synthesized by plasma assisted simultaneous oxidization on MgO(100) have been studied with X-ray magnetic circular dichroism (XMCD). The ultrathin film retains a rather large total magnetic moment, i.e. (2.73±0.15)μB/f.u., which is ~ 70% of that for the bulk-like Fe3O4. A significant unquenched orbital moment up to (0.5...